.class1 {
  width: 200px;
  height: 200px;
  background-color: #56a5f1;
}
.class2 {
  width: 150px;
  height: 150px;
  background-color: #111213;
}
.class3 {
  width: 100px;
  height: 100px;
  background-color: #abe214;
}